ThThis one has an an elementary solution. You didid not calibrate the speed or inclination ofof the two treadmills. Scott Semple has his owown blog with a great post on how to cacalibrate speed.I posted on this forum about the utility of using a phone ininclinometer app to measure real ininclination. Better to pause a miminute and restart the same treadmill between stages.
Another Confusing Drift Test Result
I’ve looked through threads for similar questions and can’t find any, so here’s another question about a strange drift test result.
I retested my AeT at 140 last week as my pace at my old AeT of 135 has increased by about a mile/minute on flat ground over the last couple of months. I warmed up for about 15 minutes, and my heart rate began to rise quickly after I started the test. My average HR in the first 15 minutes was 141, and in the second 15 minutes was 145. Extrapolating a trend from my first-half results would have yielded an average first-half HR of 144 and an average second-half HR of 152. This 8 bpm spread would have been just over a 5% drift rate. But instead my heart rate quickly dropped after I crossed the 30 minute mark, and I averaged 143 bpm in the second half of the test. This kind of peak-shaped HR graph for a test was pretty out of character for my norm. Does this just mean my AeT is now significantly above 140? It seems unlikely it’s much higher than that given where I was a few months ago.
If the test got messed up, what could the culprit be? Maybe I didn’t warm up enough? My gym’s treadmills only go for 60 minutes before automatically cooling down, so I had a friend get another treadmill next to mine up to speed and incline halfway through, allowing me to jump to that treadmill with no break in the action and avoid a cooldown at the 45 minute mark. The second treadmill felt exactly the same, but maybe it was imperceptibly slower and that caused my HR to drop? I also noticed that my HR looks pretty jumpy in general, so I’m attaching pictures of the graphs from my first and second halves of the test. I don’t think it’s a faulty monitor- I was using a fairly new and well-cared for strap.
Thanks for the help yall!
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